Core induction furnace melting power supply unit

Abstract

The invention relates to the technical field of induction heating cored induction furnaces, in particular to a cored induction furnace melting starting power source device. The cored induction furnace melting starting power source device comprises an induction voltage regulator, an on and off switching unit, a control and display unit, a frequency converter and a voltage regulating driving motor. Compensation capacitors C are connected with the two ends of an inductor coil L of an cored induction furnace in parallel, a factory power source and a heating power source supply power to the inductor coil L through the on and off switching unit, the on and off switching unit controls connection and disconnection of the factory power source and the inductor coil L or the heating power source and the inductor coil L, the control and display unit monitors the output power of the on and off switching unit and outputs signals to the frequency converter, and the frequency converter controls the voltage regulating driving motor to rotate so as to realize adjustment of the output voltage of the induction voltage regulator. Due to the fact that the induction voltage regulator is adopted to adjust the output power of the factory power source, the output power of the factory power source can gradually increase from zero, and the phenomenon of channel breakage caused by the fact that the initial power is too high is effectively avoided.

Description

technical field [0001] The invention relates to the technical field of induction heating cored induction furnaces, in particular to a starting melting power supply device for cored induction furnaces. Background technique [0002] The induction furnace is an electric furnace that uses the induction electrothermal effect of the material to heat, melt or keep the material warm. There are three types of AC power used in induction furnaces: power frequency (50 or 60 Hz), intermediate frequency (150-10000 Hz) and high frequency (higher than 10000 Hz). The main components of an induction furnace include an inductor, a furnace body, a power supply, a capacitor, and a control system. Under the action of the alternating electromagnetic field of the induction furnace coil, eddy currents are generated inside the material to achieve the heating effect. Induction furnaces can be used for smelting and heat preservation of materials, and are usually divided into core induction furnaces a...

AI Technical Summary

Problems solved by technology

For loads composed of compensation capacitors and induction coils connected in parallel, it is difficult for general power electronic power regulators to achieve power regulation. At present, there is no mature and reliable product for continuous voltage regulation and power regulation of such loads to realize induction melting furnaces. Smooth start-up of cored inductor

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